linux-kernel - [tip:perf/core] perf bpf: Add bpf

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Message-ID: <tip-h3q9rxxkbzetgnbro5rclqft@git.kernel.org>
Date:   Sat, 26 Jan 2019 02:10:15 -0800
From:   tip-bot for Arnaldo Carvalho de Melo <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     mingo@...nel.org, daniel@...earbox.net,
        linux-kernel@...r.kernel.org, lclaudio@...hat.com,
        adrian.hunter@...el.com, hpa@...or.com, namhyung@...nel.org,
        yhs@...com, wangnan0@...wei.com, kafai@...com, tglx@...utronix.de,
        jolsa@...nel.org, acme@...hat.com
Subject: [tip:perf/core] perf bpf: Add bpf_map() helper

Commit-ID:  b45d5511aa9029264740e2353ad7faf3cd444703
Gitweb:     https://git.kernel.org/tip/b45d5511aa9029264740e2353ad7faf3cd444703
Author:     Arnaldo Carvalho de Melo <acme@...hat.com>
AuthorDate: Thu, 24 Jan 2019 15:01:46 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Fri, 25 Jan 2019 15:12:10 +0100

perf bpf: Add bpf_map() helper

To make the declaration of maps more compact, the following patches will
make use of it.

Standardizing on it will allow to add the BTF details, i.e.
BPF_ANNOTATE_KV_PAIR() (tools/testing/selftests/bpf/bpf_helpers.h)
transparently.

Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@...hat.com>
Cc: Martin KaFai Lau <kafai@...com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Wang Nan <wangnan0@...wei.com>
Cc: Yonghong Song <yhs@...com>
Link: https://lkml.kernel.org/n/tip-h3q9rxxkbzetgnbro5rclqft@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/include/bpf/bpf.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/perf/include/bpf/bpf.h b/tools/perf/include/bpf/bpf.h
index e667577207dc..0482028c1d11 100644
--- a/tools/perf/include/bpf/bpf.h
+++ b/tools/perf/include/bpf/bpf.h
@@ -18,6 +18,14 @@ struct bpf_map {
         unsigned int numa_node;
 };
 
+#define bpf_map(name, _type, type_key, type_val, _max_entries)	\
+struct bpf_map SEC("maps") name = {				\
+	.type	     = BPF_MAP_TYPE_##_type,			\
+	.key_size    = sizeof(type_key),			\
+	.value_size  = sizeof(type_val),			\
+	.max_entries = _max_entries,				\
+}
+
 /*
  * FIXME: this should receive .max_entries as a parameter, as careful
  *	  tuning of these limits is needed to avoid hitting limits that